Gravitational-Wave Observatories Should be Able to Detect Primordial Black Hole Mergers, if They’re out There
The tumultuous era of the big bang may have been chaotic enough to flood the universe with primordial black holes. Eventually some of those black holes will find each other and merge, sending out ripples of gravitational waves. A comprehensive search for those gravitational wave signatures hasn’t found anything, putting tight constraints on the abundance of these mysterious objects.
Continue Reading